COmbinative Distance-based Assessment (CODAS) is one of the significant MCDM methods. Since human opinions generally contain indefiniteness, this indefiniteness should be considered in decision-making evaluations. In this paper, spherical fuzzy sets (SFSs) are used to represent human thoughts through truthiness, indecision and falsity degrees which are independent values among themselves. Proportional SFSs are the one of the extensions of SFSs, which have been shown by Kahraman [2]. In this paper, CODAS is extended with interval-valued proportional SFSs, and its steps are presented.